LangChainThe open agent platform to own your intelligence
vs
Pydantic AIBuild agents you'll actually ship to production
Comparison · AI Agents · weekly run Nov 3
LangChain vs Pydantic AI
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
LangChain is the stronger AI pick in AI Agents: it has a visibility score of 10.4 versus 1.2 for Pydantic AI, and ranks ahead in 100% of the answers that name both.
Choose LangChain if…
- You want the brand AI engines rank higher (10.4 vs 1.2)
- You want a lower entry price ($39 vs $49)
- You need a self-hosted or on-premises option
- You prefer a larger, established vendor (201–500 employees)
Choose Pydantic AI if…
- AI answers describe it more positively (100% vs 17% positive)
- Usage-based pricing suits your budget better than per seat
- Type-safe, production-grade application code
AI visibility side by side
Latest weekly run · Nov 3
| Metric | LangChain | Pydantic AI |
|---|---|---|
| Visibility score | 10.4% | 1.2% |
| Change vs last week | New | New |
| Rank in AI Agents | #12 | #54 |
| Share of voice | 2.7% | 0.4% |
| Mentions this run | 18 | 2 |
| Positive in AI answers | 17% | 100% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
LangChain 0pp · Pydantic AI 0pp over 0 weekly runs.
Engine by engine
LangChain leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
LangChainPydantic AI
Head to head in AI answers
1 engine answers name both brands
1LangChain ranked higher
0Pydantic AI ranked higher
| Prompt | Engine | LangChain | Pydantic AI |
|---|---|---|---|
| Best AI agent platform for startups | AI Mode | #2 | #5 |
Features, pricing & fit
| Dimension | LangChain | Pydantic AI |
|---|---|---|
| Pricing model | Per seat | Usage-based |
| Entry price | Free; paid from $39 per seat / mo | Free; paid from $49 / mo |
| Free plan | Yes | Yes |
| Deployment | Cloud (SaaS), hybrid (SaaS control plane with self-hosted data plane), or self-hosted in the customer's VPC | — |
| Support | Community forum, Support portal, Email support, Slack | Enterprise tier includes 24/7 priority access to engineers and custom SLAs |
| Founded | 2023 | — |
| Headquarters | San Francisco, CA, United States | California, United States |
| Employees | 201–500 | 11–50 |
| Funding | Series B, led by IVP | Series A · $17M raised |
| Best for | Teams building agents that need control over models, context, memory and deployment, and the ability to test, govern and improve them in production | Teams building type-safe AI agents that they intend to ship to production |
Plans side by side
LangChain
Developer$0seat per month, then pay as you go
Plus$39seat per month, then pay as you go
EnterpriseCustomcustom pricing, then pay as you go
Pros and cons
Themes from the AI answers that mention each brand
LangChain
- Stateful multi-agent orchestration via state graphs
- Strong open-source adoption with large download numbers
- Suited to enterprise agent loops
- Heavy developer framework that requires coding
Pydantic AI
- Type-safe, production-grade application code
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “LangChain vs Pydantic AI”, https://slateindex.ai/compare/langchain-vs-pydantic-ai, data of Nov 3, 2026. Licence: CC BY 4.0.